Browsing PHY – Journal Articles: Publisher & Author Versions (Post-Print Author Versions) – Physics by Author "Övgün, Ali"

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Browsing PHY – Journal Articles: Publisher & Author Versions (Post-Print Author Versions) – Physics by Author "Övgün, Ali"

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  • Black hole radiation of massive spin-2 particles in (3+1) dimensions 
    Sakallı, İzzet; Övgün, Ali (Springer, 2016-06-03)
    This paper is devoted to the study of radiation of massive spin-2 boson (graviton with a nonzero mass) through the event horizon of a generic static and spherically symmetric black hole in (3+1) dimensions. To this end, ...
  • Canonical Acoustic Thin-Shell Wormholes 
    Jusufi, Kimet; Övgün, Ali (World Scientific Publishing Co Pte Ltd, 2017-02-16)
    In this paper, we model a canonical acoustic thin-shell wormhole (CATSW) in the framework of analogue gravity systems. In this model, we apply cut and paste technique to join together two spherically symmetric, analogue ...
  • Existence of traversable wormholes in the spherical stellar systems 
    Övgün, Ali; Halilsoy, Mustafa (Springer, 2016-05-27)
    Potentiality of the presence of traversable wormholes in the outer/inner regions of the halos of galaxies, situated on the Navarro-Frenk-White (NFW) density profile and Universal Rotation Curve (URC) dark matter models ...
  • Gravitational Lensing Effect on the Hawking Radiation of Dyonic Black Holes 
    Sakllı, İzzet; Övgün, Ali; Mirekhtiary, S.F. (World Scientific Publishing, 2014-06-24)
    In this paper, we analyze the Hawking radiation (HR) of a non-asymptotically flat (NAF) dyonic black hole (dBH) in four-dimensional (4D) Einstein–Maxwell–Dilaton (EMD) gravity by using one of the semiclassical approaches ...
  • Gravitinos tunneling from traversable Lorentzian wormholes 
    Sakalli, İzzet; Övgün, Ali (Astrophysics and Space Science, Springer, 2015-08-19)
    Recent research shows that Hawking radiation (HR) is also possible around the trapping horizon of a wormhole. In this article, we show that the HR of gravitino (spin-3/2 ) particles from the traversable Lorentzian wormholes ...
  • GUP Assisted Hawking Radiation of Rotating Acoustic Black Holes 
    Sakallı, İzzet; Övgün, Ali; Kimet, Jusufi (Springer, 2016-09-13)
    Recent studies (Steinhauer in Nat. Phys. 10:864, 2014, Phys. Rev. D 92:024043, 2015) provide compelling evidences that Hawking radiation could be experimentally proven by using an analogue black hole. In this paper, taking ...
  • Hawking Radiation of Mass Generating Particles From Dyonic Reissner Nordström Black Hole 
    Sakallı, İzzet; Övgün, Ali (Springer, 2016-08-20)
    The Hawking radiation is considered as a quantum tunneling process, which can be studied in the framework of the Hamilton–Jacobi method. In this study, we present the wave equation for a mass generating massive and charged ...
  • Hawking Radiation of Spin-1 Particles from a Three-Dimensional Rotating Hairy Black Hole 
    Sakallı, İzzet; Övgün, Ali (Journal of Experimental and Theoretical Physics, 2015-09-27)
    We study the Hawking radiation of spin-1 particles (so-called vector particles) from a three-dimensional rotating black hole with scalar hair using a Hamilton–Jacobi ansatz. Using the Proca equation in the WKB approximation, ...
  • Inflation and Acceleration of the Universe by Nonlinear Magnetic Monopole Fields 
    Övgün, Ali (Springer, 2017-02-16)
    Despite impressive phenomenological success, cosmological models are incomplete without an understanding of what happened at the big bang singularity. Maxwell electrodynamics, considered as a source of the classical Einstein ...
  • Massive Vector Particles Tunneling From Noncommutative Charged Black Holes and its GUP-corrected Thermodynamics 
    Övgün, Ali; Jusufi, Kimet (Springer, 2016-05-30)
    In this paper, we investigate the tunneling process of charged massive bosons W± (spin-1 particles) from noncommutative charged black holes such as charged RN black holes and charged BTZ black holes. By applying the WKB ...
  • A particular thin-shell wormhole 
    Sakallı, İzzet; Övgün, Ali (Springer, 2017-02-09)
    Using a black hole with scalar hair, we construct a scalar thin-shell wormhole (TSW) in 2+1 dimensions by applying the Visser cut and paste technique. The surface stress, which is concentrated at the wormhole throat, is ...
  • Quantum tunneling of massive spin-1 particles from non-stationary metrics 
    Sakallı, İzzet; Övgün, Ali (General Relativity and Gravitation, Springer, 2015-11-15)
    We focus on the HR of massive vector (spin-1) particles tunneling from Schwarzschild BH expressed in the Kruskal–Szekeres and dynamic Lemaitre coordinates. Using the Proca equation together with the Hamilton–Jacobi and ...
  • Rotating Thin-Shell Wormhole 
    Övgün, Ali (SpringerLink, 2016-11-08)
    We construct a rotating thin-shell wormhole using a Myers-Perry black hole in five dimensions, using the Darmois-Israel junction conditions. The stability of the wormhole is analyzed under perturbations. We find that exotic ...
  • Thin-shell wormholes from the regular Hayward black hole 
    Halilsoy, Mustafa; Övgün, Ali; Mazharimousavi, S. Habib (The European Physical Journal C, Springer, 2014-03-13)
    We revisit the regular black hole found by Hayward in 4 -dimensional static, spherically symmetric spacetime. To find a possible source for such a spacetime we resort to the nonlinear electrodynamics in general relativity. ...
  • Tunneling of Massive Vector Particles From Rotating Charged Black Strings 
    Jusufi, Kimet; Övgün, Ali (Springer, 2016-06-02)
    We study the quantum tunneling of charged massive vector bosons from a charged static and a rotating black string. We apply the standard methods, first we use the WKB approximation and the Hamilton-Jacobi equation, and ...
  • Tunnelling of vector particles from Lorentzian wormholes in 3+1 dimensions 
    Sakallı, İzzet; Övgün, Ali (THE EUROPEAN PHYSICAL JOURNAL PLUS, Springer, 2015-06-11)
    In this article, we consider the Hawking radiation (HR) of vector (massive spin-1) particles from the traversable Lorentzian wormholes (TLWH) in 3+1 dimensions. We start by providing the Proca equations for the TLWH. ...
  • Uninformed Hawking radiation 
    Sakallı, İzzet; Övgün, Ali (EPL, IOP Publishing (Institute of Physics), 2015-04-24)
    We show in detail that the Parikh-Wilczek tunneling method (PWTM), which was designed for resolving the information loss problem in Hawking radiation (HR) fails whenever the radiation occurs from an isothermal process. ...